Torch for preheating a continuously fed welding wire

Details Torch for preheating a continuously fed welding wire Torch for preheating a continuously fed welding wire

1986-02-14

1987-05-19

Goldberg, E. A.

Electric heating

Metal heating

By arc

21913762, 21913744, 219 74, B23K 916

Patent

active

046670831

ABSTRACT:
A torch for use in welding has a first embodiment for gas metal arc welding and a second embodiment used for hot wire gas-tungsten arc welding. Both embodiments include a torch housing having a first and second end. A wire guide tube is centrally disposed within the housing. An upper electrode contact tip, a lower electrode contact tip and a dielectric material disposed therebetween are positioned at one end of the wire guide tube. An inner power cooling assembly comprises a first cylindrical member concentrically disposed about the wire guide tube and provides electric power to the upper electrode contact tip. The inner power cooling assembly defines a first chamber within which cooling water is circulated in contact with the upper electrode contact tip. An outer power cooling assemblycomprises a second cylindrical member and is electrically isolating from the inner power assembly. The second cylindrical member is in electrical communication with the lower electrode contact tip and defines therewithin a second chamber within which cooling water is circulated. In the gas metal arc welding configuration, a gas supply assembly is included in the torch housing and comprises an outer gas tube circumferentially disposed about the second cylindrical member.

REFERENCES:
patent: 2347646 (1944-05-01), Smith
patent: 2777928 (1957-01-01), Bernard
patent: 2963570 (1960-12-01), Rieppel
patent: 3544758 (1970-12-01), dal Molin
patent: 4309590 (1982-01-01), Stol
patent: 4447703 (1984-05-01), Stol
Psaras, G. G. et al., "Torches for Welding Aluminum and its Alloys with a Consumable Electrode in Shielding." Weld. Prod. (GB), vol. 17, No. 7, (Jul. 1970, pp. 72-73.).

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